If are genuinely worried that someone is going to kick it in then you put a security bar on it.
https://www.amazon.com/dp/B08DHQJD1Z/ref=cm_sw_r_sms_api_glt_fabc_EMHPF4XG946S2RWYFF6H?_encoding=UTF8&psc=1

I would bolt those into a stud not the door frame.